tty/serial: RS485 bindings for device tree
Generic bindings for RS485 feature included in some UARTs.
Those bindings have to be used withing an UART device tree node.
Documentation updated to link to the bindings definition.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/Documentation/serial/serial-rs485.txt b/Documentation/serial/serial-rs485.txt
index c8878f8..079cb3d 100644
--- a/Documentation/serial/serial-rs485.txt
+++ b/Documentation/serial/serial-rs485.txt
@@ -28,6 +28,10 @@
RS485 communications. This data structure is used to set and configure RS485
parameters in the platform data and in ioctls.
+ The device tree can also provide RS485 boot time parameters (see [2]
+ for bindings). The driver is in charge of filling this data structure from
+ the values given by the device tree.
+
Any driver for devices capable of working both as RS232 and RS485 should
provide at least the following ioctls:
@@ -121,3 +125,4 @@
5. REFERENCES
[1] include/linux/serial.h
+ [2] Documentation/devicetree/bindings/serial/rs485.txt